A still image taken from a video clip from a social media website purportedly shows Anis Amri, the Tunisian suspect of the Berlin Christmas market attack, at an unknown location.

Reuters
A still image taken from a video clip from a social media website purportedly shows Anis Amri, the Tunisian suspect of the Berlin Christmas market attack, at an unknown location.

TUNIS (Reuters) - Tunisian security forces have arrested three suspected militants after uncovering their links to Anis Amri, the Tunisian national believed responsible for the Berlin Christmas market attack that killed 12 people, Tunisia’s Interior Ministry said on Saturday.

The ministry said Amri’s nephew was among the three men and had been in touch by social media messaging with Amri, who was killed on Friday by Italian police after he pulled a gun on them during a routine search.

In Spain, intelligence services are investigating a possible connection via Internet between Amri and a Spanish resident on Dec. 19, Interior Minister Juan Ignacio Zoido told radio station COPE on Saturday.

He said police and security forces were studying the information and deciding whether to make any arrests.

Amri, 24, is suspected of ploughing a truck through the Berlin market on Monday. In a video released on Friday after his death, he is seen pledging his allegiance to militant group Islamic State leader Abu Bakr al-Baghdadi.